Fire extinguishing system for high and large space place

Abstract

The utility model discloses a fire extinguishing system for high and large space places, which comprises a water supply pipe network, the water supply pipe network comprises a water supply main pipe, one or more branch pipes, one or more branch pipes and water drain pipes, and one end of each branch pipe is connected with the water supply main pipe; one ends of the one or more branch pipes are connected with the branch pipe, and a plurality of fire extinguishing devices are arranged at the other ends of the branch pipes; a first control valve and a second control valve are arranged on the branch pipe, the water drain pipe is connected with the branch pipe located between the first control valve and the second control valve, and an electric water drain valve is arranged on the water drain pipe. The automatic fire extinguishing device provides an automatic fire extinguishing mode for high and large space places which are strict in mistaken spraying and strict in water filling prohibition.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting water supply equipment, in particular to a fire-fighting system used in large space places. Background Art

[0002] Large spaces (referring to places in civil and industrial buildings with a clearance height greater than or equal to 8 meters and less than 25 meters) are often seen in art and fine arts exhibition halls. Because their exhibits are flammable, they must be equipped with automatic fire extinguishing systems. However, exhibits are generally afraid of water and cannot tolerate water immersion, which leads to the need to consider strictly prohibiting accidental spraying in large spaces. However, the existing fire extinguishing system consists of fire extinguishing devices, detection devices, control devices, water flow indicators, as well as pipes, water supply networks, water supply facilities and other main components. Wet pipes are used at the fire extinguishing device, and there is no automatic water discharge pipe. If the system malfunctions, water cannot be discharged quickly. Utility Model Content

[0003] The utility model aims to provide a fire extinguishing system for large spaces, which is used in places with a net height of more than 8 meters, and at least solves the problem that the traditional pre-action fire extinguishing system causes the pipe network to be filled with water and cannot drain water quickly under false alarm conditions.

[0004] The utility model provides a fire extinguishing system for a large space, the system comprising:

[0005] A water supply network, the water supply network comprising a water supply main, one or more branch pipes, one or more branch pipes, and a drain pipe, one end of each branch pipe is connected to the water supply main; one end of each branch pipe is connected to the branch pipe, and the other end of each branch pipe is provided with a plurality of fire extinguishing devices;

[0006] The branch pipe is provided with a first control valve and a second control valve, the drain pipe is connected to the branch pipe located between the first control valve and the second control valve, and the drain pipe is provided with an electric drain valve.

[0007] Furthermore, the multiple fire extinguishing devices are spray-type automatic jet fire extinguishing devices and / or injection-type automatic jet fire extinguishing devices.

[0008] Furthermore, the system also includes a pre-action device, which includes a pre-action alarm valve group, an air compressor, and a quick exhaust valve. The pre-action alarm valve group is installed between the water supply main and the branch pipe, the quick exhaust valve is connected to one end of the branch pipe away from the water supply main, and the air compressor is connected to the branch pipe.

[0009] Furthermore, the branch pipe between the first control valve and the second control valve is also provided with a water flow indicator.

[0010] Furthermore, the water supply network also includes a fire water tank and a fire water pool, and both ends of the water supply main are connected to the fire water tank and the fire water pool respectively.

[0011] Furthermore, a pressure relief pipeline is provided between the water supply main and the fire water tank, and a pressure relief valve is provided on the pressure relief pipeline.

[0012] Furthermore, the system also includes a control device, which is controllably connected to the first control valve and the second control valve.

[0013] Furthermore, the control device is controllably connected to the electric drain valve.

[0014] Furthermore, the system also includes a detection device and a control module box. The control device is controllably connected to the control module box, and the control module box is controllably connected to the detection device, the second control valve, and the electric drain valve.

[0015] Furthermore, the detection device is arranged near the fire extinguishing device.

[0016] The utility model adds a second control valve behind the first control valve, and a drain pipe and an electric drain valve are arranged on the branch pipe between the first control valve and the second control valve, so that the branch pipe has a drain function. When the system malfunctions, the water in the pipeline can be quickly drained by opening the electric drain valve, ensuring that the pipe network behind the second control valve is in a dry state under non-fire conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the fire extinguishing system of the utility model embodiment;

[0018] Figure 2 This is a schematic diagram of the application of the utility model fire extinguishing system in the atrium of the exhibition hall;

[0019] Figure 3 This is the control principle diagram of the pre-action injection type automatic jet fire extinguishing system of the utility model.

[0020] 1. Fire water tank; 2. Fire water pump; 3. Fire water pump control cabinet; 4. Check valve; 5. Manual valve; 6. Water pump coupler; 7. High-level fire water tank; 8. Pressure relief valve; 9. Inspection valve; 10. Water flow indicator; 11. Control module box; 12. Second control valve; 13. First detection device; 13a. Second detection device; 14. Fire extinguishing device; 15. Simulated terminal water test device; 16. Control device; 17. Branch pipe; 18. Branch pipe; 19. Interlocking controller; 20. Electric drain valve; 21. Quick exhaust valve; 22. Pre-action alarm valve group; 23. Flow switch; 24. Control panel; 25. Air compressor; 26. First control valve. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0023] The utility model embodiment discloses a fire extinguishing system for a large space, the system comprising:

[0024] A water supply network, the water supply network comprising a water supply main, one or more branch pipes 17, one or more branch pipes 18, and a drain pipe, one end of the branch pipe 17 is connected to the water supply main; one end of one or more branch pipes 18 is connected to the branch pipe 17, and the other end of the branch pipe 18 is provided with a plurality of fire extinguishing devices 14;

[0025] The branch pipe 18 is provided with a first control valve 26 and a second control valve 12 . The drain pipe is connected to the branch pipe 18 between the first control valve 26 and the second control valve 12 . The drain pipe is provided with an electric drain valve 20 .

[0026] When the fire extinguishing system is turned on, by opening the first control valve 26 and the second control valve 12 and closing the electric drain valve 20, water will flow through the branch pipe 18 to the fire extinguishing device 14 to achieve fire extinguishing.

[0027] When the fire extinguishing system is mistakenly opened, the second control valve 12 can be closed and the electric drain valve 20 can be opened. Water will flow into the drain pipe through the branch pipe 18 to realize the drain process. Under this working condition, the water flow will not enter the pipe section after the second control valve 12.

[0028] The embodiment of the utility model is that the second control valve 12 is arranged behind the first control valve 26, and a drain pipe is arranged on the branch pipe 18 between the first control valve 26 and the second control valve 12, so that the branch pipe 18 has a drain function. When the system malfunctions, the electric drain valve 20 can be opened to quickly drain the water before the second control valve 12, ensuring that the pipe network after the second control valve is in a dry state under non-fire conditions.

[0029] Optionally, the plurality of fire extinguishing devices 14 are spray-type automatic jet fire extinguishing devices and / or injection-type automatic jet fire extinguishing devices.

[0030] A spraying type automatic jet fire extinguishing device or an injection type automatic jet fire extinguishing device is installed at the end of the branch pipe 18, and each fire extinguishing device 14 is equipped with a detection device.

[0031] Optionally, the system also includes a pre-action device, which includes a pre-action alarm valve group 22, an air compressor 25, and a quick exhaust valve 21. The pre-action alarm valve group 22 is installed between the water supply main and the branch pipe 17, the quick exhaust valve 21 is connected to one end of the branch pipe 17 away from the water supply main, and the air compressor 25 is connected to the branch pipe 17.

[0032] Wherein, the branch pipe 17 and the branch pipe 18 are dry pipes in the quasi-working state;

[0033] The detection device, the pre-action alarm valve group 22, the first control valve 26, the second control valve 12, and the electric drain valve 20 are all connected to the control device 16 control signal.

[0034] Specifically, the pre-action device is installed on the water supply main, and is composed of a pre-action alarm valve group 22, a control panel 24 and matching pipeline accessories. The alarm valve group 22 is a pressure switch, and the pipeline accessories include a hydraulic alarm, a delay device, and a solenoid valve in addition to the electric drain valve 20. It is a one-way valve group device that is opened by electric, pneumatic, mechanical or other methods to allow water to flow into the sprinkler system in one direction and issue an alarm at the same time.

[0035] The existing automatic jet fire extinguishing system may cause pipe leakage due to pipe corrosion, loose joints, etc. due to long-term water filling in the pipes. It is not suitable for buildings with high requirements for water damage prevention and control. In addition, water filling in the pipes is susceptible to freezing and pipe blockage. Therefore, additional measures need to be taken to protect the system in cold areas, which increases the construction cost.

[0036] Since the pipe network behind the pre-action alarm valve group 22 is a dry pipe network, the embodiment of the utility model can be applied to cold areas and buildings where water damage is not allowed. The embodiment of the utility model combines the spraying and / or jetting automatic jet fire extinguishing system with the pre-action device, and on the basis of realizing the automatic fire extinguishing function, improves the safety and reliability of the system, plays a dual protection role for the protected object, and provides a feasible automatic fire extinguishing method for large spaces where accidental spraying and pipeline leakage are strictly prohibited. The system has the advantages of greater safety and wider application range.

[0037] The embodiment of the utility model further enhances the safety and reliability of the system by setting a control valve and an electric drain valve on the basis of the dry pipe network of the traditional pre-action alarm valve group. Even when the system malfunctions, the pipeline after the second control valve can be kept in a dry state, completely prohibiting accidental spraying, and ensuring that the pipeline is in a dry state under non-fire conditions, completely avoiding water leakage.

[0038] Optionally, the pre-action device further comprises a quick exhaust valve 21, and the quick exhaust valve 21 is installed at the end of the branch pipe 17; the branch pipe 17 and the branch pipe 18 are filled with pressurized gas during quasi-operation;

[0039] The branch pipe 17 is connected to an air pressure maintaining device, which is an air compressor 25 , and the air compressor 25 is connected to the branch pipe 18 .

[0040] Specifically, the air compressor 25 inflates the pipeline behind the pre-action alarm valve group 22. According to needs, when in use, the air compressor 25 can be started when the system pressure drops to 0.03MPa, the air compressor 25 can be stopped when the system pressure rises to 0.05MPa, and an alarm can be sounded when the system pressure drops to 0.02MPa.

[0041] The quick exhaust valve 21 is arranged at the end of the horizontal pipe network. When the pre-action alarm valve group 22 is actuated, it serves as a device for quickly removing gas from the pipe to improve the efficiency of the water transport equipment and protect the pipe from deformation and rupture.

[0042] A pre-action alarm valve group 22 is added to the water supply main, and the pipe network behind it is usually filled with pressurized gas; a quick exhaust valve 21 is added at the end of the horizontal pipe network in each partition. When a fire occurs, before the fire extinguishing device 14 is activated, the pre-action alarm valve group 22 and the quick exhaust valve 21 are opened to extend the buffer time. The detection device includes a first detection device 13a and a second detection device 13. When in use, the alarm of the first detection device 13a is a trigger signal of the pre-action alarm valve group 22 as needed, and the alarms of the first detection device 13a and the second detection device 13 are both triggered as the second control valve 12 and the automatic electric drain valve 20. When only the second detection device 13 alarms but the first detection device 13a does not alarm, during the process of exhausting gas from the pipeline and starting the fire pump 2 to fill water, the water filled due to the false start can be quickly discharged by closing the second control valve 12 and opening the automatic electric drain valve 20, so as to restore the dry pipeline and improve the safety of the system.

[0043] In the existing spraying and / or automatic jetting fire extinguishing systems, after the detection component detects the alarm signal, the corresponding fire pump is immediately automatically started by the fire extinguishing device 14 controller or directly started by the staff with management authority, without buffer time for correcting the wrong start. At the same time, after the system malfunctions, the entire pipe network is filled with water and cannot be automatically drained, which will increase the risk of water leakage.

[0044] The embodiment of the utility model provides error correction time for the fire extinguishing system to be started up by mistake, thus avoiding unnecessary losses. Since the pipe network behind the pre-action alarm valve is usually filled with pressurized gas, the embodiment of the utility model can be applied to cold areas and buildings where water damage is not allowed. The embodiment of the utility model is provided with a second control valve 12 and an electric drain valve 20. When the pipe network is filled with water due to a false alarm of the system, the water in the pipe network can be quickly drained by opening the drain pipe, and the pipe network behind the second control valve 12 is ensured to be in a dry state under non-fire conditions.

[0045] Optionally, the branch pipe 18 between the first control valve 26 and the second control valve 12 is further provided with a water flow indicator 10 .

[0046] The first control valve 26 and the second control valve 12 are solenoid valves or electric valves.

[0047] Optionally, the water supply network further includes a fire water tank and a fire water pool 1, and both ends of the water supply main are connected to the fire water tank and the fire water pool 1 respectively.

[0048] Among them, Figure 1 As shown, a water pump connector 6 is also provided on the water supply main, and the end of the water supply main connected to the fire water tank 1 is also connected in sequence to a fire water pump 2, a check valve 4, and a water pump connector 6. The fire water pump 2 is connected to the control signal of the fire water pump control cabinet 3; a flow switch 23 is installed between the water supply main and the high-level fire water tank 7.

[0049] Particularly, a pressure relief pipeline is provided between the water supply main and the fire water pool 1 , and a pressure relief valve 8 is provided on the pressure relief pipeline.

[0050] Particularly, the system further comprises a control device 16 , and the control device 16 is control-connected to the first control valve 26 and the second control valve 12 .

[0051] Particularly, the system further comprises a control module box 11 , the control device 16 is control-connected to the control module box 11 , and the control module box 11 is control-connected to the first detection device 13 a , the second detection device 13 , the second control valve 12 , and the electric drain valve 20 .

[0052] Among them, the control device is a control host and a field control box. The control module box 11 is connected to the first detection device 13a, the second detection device 13, the second control valve 12, the electric drain valve 20, and the control device 16; the control device 16 is also connected to the linkage controller 19 or the automatic alarm system host and the simulated terminal water testing device 15.

[0053] Particularly, the first detection device 13a and the second detection device 13 are arranged near the fire extinguishing device 14 .

[0054] Embodiment 2, as Figure 2 As shown, Example 1 is applied to a large exhibition hall, which is an art gallery with a clearance height exceeding 16 meters. The pre-action device and the air compressor 25 are installed outside the exhibition hall; the branch pipe 18 and the fire extinguishing device 14 are installed in the ceiling of the exhibition hall.

[0055] The working principle of the embodiment of the utility model is as follows Figure 3 shown.

[0056] Automatic fire extinguishing mode: When a fire occurs, the first detection device 13a sends out a fire alarm signal. After receiving the alarm signal, the fire alarm controller sends out a command to open the pre-action alarm valve group 22 on the water supply main, and at the same time open the quick exhaust valve 21 to discharge the gas in the corresponding branch pipe 17, and automatically start the corresponding fire pump 2 to fill the pipe network behind the pre-action alarm valve group 22 with water, and at the same time shut down the air compressor. When the second detection device 13 on the other side also detects the fire source, it opens the corresponding second control valve 12, and the corresponding fire extinguishing device 14 automatically starts the jet to extinguish the fire; when the second detection device 13 on the other side does not detect the fire source and determines that the system is mistakenly started, it opens the automatic drain valve 20 to discharge the water in the pipe network caused by the mistaken start of the system.

[0057] Manual fire extinguishing method:

[0058] When a fire occurs, the automatic fire alarm system sends out a fire alarm signal, and the staff with management authority opens the system pre-action alarm valve group 22 and the quick exhaust valve 21, and directly starts the corresponding fire water pump 2 to fill the pipe network with water. At the same time, the corresponding second control valve 12 can be opened through the fire extinguishing device 14 controller, and the corresponding fire extinguishing device 14 automatically opens the jet to extinguish the fire, achieving a delayed water spraying effect, and meeting the requirement of strictly prohibiting accidental spraying in the quasi-working state.

[0059] The utility model applies the pre-action system to the fire extinguishing system to avoid water damage caused by system mis-spraying and pipe leakage. When using a spray-type automatic jet fire extinguishing device, the maximum protection radius is 6m when the design flow rate is 5L / S, and the maximum protection radius is 7m when the design flow rate is 10L / S; the maximum installation height is 25m when the design flow rate is 5L / S and the design flow rate is 10L / S; the design flow rate is calculated according to the water spray intensity and the action area; the number of fire openings is determined comprehensively according to the flow specifications of the fire extinguishing device 14 and the fire hazard level of the protected place.

[0060] Article 5.0.10 and Article 5.0.11 of the "Design Specification for Automatic Sprinkler Fire Extinguishing Systems" GB 50084 stipulate that the parameters of the dry system and pre-action system refer to Table 5.0.1, but not Table 5.0.2. Therefore, the dry system and pre-action system are only applicable to places not exceeding 8m. The utility model applies the pre-action system to the spraying or jetting automatic jet fire extinguishing system, which can be used in large spaces with a clearance height of more than 12 meters; avoiding water damage caused by mis-spraying.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the specification of this application, the technicians can still modify or replace the specific implementation mode of the utility model with equivalents, but these modifications or changes do not deviate from the scope of protection of the pending claims of the utility model application.

Claims

1. A fire extinguishing system for large spaces, characterized in that: The system comprises: A water supply network, the water supply network comprising a water supply main, one or more branch pipes, one or more branch pipes, and a drain pipe, one end of each branch pipe is connected to the water supply main; one end of each branch pipe is connected to the branch pipe, and the other end of each branch pipe is provided with a plurality of fire extinguishing devices; The branch pipe is provided with a first control valve and a second control valve, the drain pipe is connected to the branch pipe located between the first control valve and the second control valve, and the drain pipe is provided with an electric drain valve.

2. A fire extinguishing system for large spaces according to claim 1, characterized in that: A plurality of the fire extinguishing devices are spray-type automatic jet fire extinguishing devices and / or injection-type automatic jet fire extinguishing devices.

3. A fire extinguishing system for large spaces according to claim 1, characterized in that: The system also includes a pre-action device, which includes a pre-action alarm valve group, an air compressor, and a quick exhaust valve. The pre-action alarm valve group is installed between the water supply main and the branch pipe, the quick exhaust valve is connected to one end of the branch pipe away from the water supply main, and the air compressor is connected to the branch pipe.

4. A fire extinguishing system for large spaces according to claim 1, characterized in that: The branch pipe between the first control valve and the second control valve is also provided with a water flow indicator.

5. A fire extinguishing system for large spaces according to claim 1, characterized in that: The water supply network also includes a fire water tank and a fire water pool, and both ends of the water supply main are connected to the fire water tank and the fire water pool respectively.

6. A fire extinguishing system for large spaces according to claim 5, characterized in that: A pressure relief pipeline is also provided between the water supply main and the fire water tank, and a pressure relief valve is also provided on the pressure relief pipeline.

7. A fire extinguishing system for large spaces according to claim 6, characterized in that: The system further comprises a control device, which is controllably connected to the first control valve and the second control valve.

8. A fire extinguishing system for large spaces according to claim 7, characterized in that: The control device is control-connected with the electric drain valve.

9. A fire extinguishing system for large spaces according to claim 7, characterized in that: The system further comprises a detection device and a control module box. The control device is controllably connected to the control module box, and the control module box is controllably connected to the detection device and the second control valve.

10. A fire extinguishing system for large spaces according to claim 9, characterized in that: The detection device is arranged near the fire extinguishing device.

Images